Have you ever installed OS just to realize that you have picked wrong ISO and instead of Datacenter Ed you have installed Standard Ed?
Luckily there is an easy and quick fix:
This will confirm your edition:
dism.exe /online /Get-CurrentEdition
This will tell you if you can change to ServerDatacenter edition
dism.exe /online /Get-TargetEditions
And with this line you change the edition (you need to use the provided by Microsoft setup key
dism.exe /online /Set-Edition:ServerDatacenter /AcceptEula /ProductKey:W3GGN-FT8W3-Y4M27-J84CP-Q3VJ9
then restart and activate with your license key.